Hollow body



Aug. 14, 1928. 1,680,697

F. G. SLAGEL HOLLOW BODY Filed July 5, 1927 Patented Aug. 14, 1928.

UNITED STATES PATENT o lc FRANKLIN G. SLAGEL, F BUFFALO, NEW YORK, ASSIGNOR TO .FEDDER-S MANU- FACTURING COMPANY, INC., 01 BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

Application filed July 5,]

the same may also be used for other purposes.

It is the object of this invention to ro-' vide a hollow bodywhich is strong and ur-' able and not liable to collapse, and which can be manufactured easily and at low cost.

In the accompanying drawings: 7 Figure'l is a longitudinal section of a hollow sheet metal body embodying my improvements. Figure 2 is a cross section taken on line 2-2, in Fig. 1. Figure 3 is a side elevation of the completed hollow body. Figures 4 and 5 are longitudinal sectional views of the two sections or parts of the improved hollow body showing the condition of the same before the same are united. Figure 6 is a fragmentary longitudinal section, on an enlarged scale, of the joint between the two sections of the hollow body.

Similar characters of reference indicate like parts in the several figures of the draw- This hollow elongated body consists of outer and inner sections 10, 11, each of which is constructed of asingle piece of sheet metal so as to be of substantially cup-shape form. The inner section 11 has a cylindrical Wall 12 which is closed atits outer end by an outwardly bulging head 13 and the outer section 10 has a cylindrical Wall 14 which is closed at its outer end by an outwardly bulging head 15. The inner wall is of slightly smaller diameter than the outer wall and the inner wall telescopes into the outer wall with a comparatively close fit. The inner Wall is provided at its inner end with a partial in comparatively long radius while the stiffeninwardly in noLLow BODY.

1927. Serial No. 203,304.

ing beads 17' are curved on-a comparatively short radius so that the stop and sealing beads are deeper than the stitl'ening beads.

The wall of the outer section is provided with a partial sealing bead19 which projects and 1 extends ,circumferentially around the same and interlocks with the outer sealing head 18 of the inner section and it is also provided at adistance from its inner edge with a' complete stop bead 20 extending circumferentially around this wall and interlocking with the partial stop bead 16 of the'inner wall, and between its sealing and stop beads 19 and 20 the wall of the outer section is provided with a straightuin beaded or uncorrugated section 21 which extends over the shallow stiffening beads of the wall. of the inner section. The oint be tween the inner and outer sections is hermetically sealed so as to renderthe same water and air tight by applying solder to the cooperating outer sealing head 18 of the inner wall and the inner sealing bead 19 of the outer wall and sweating these two heads togetllier so that the same are practically integra In the manufacture of this hollow body the inner section is made complete as shown in Fig. i, but the outer section is made incomplete by omitting its partial sealing head 19, as shown in Fig. 5. After the sections have been thus made separately the wall of the outer section is slipped over the wall of the inner section until the stop head 20 of the outer section engages the partial stop head 16 of the inner section, at which time the free'edge of the outer section overhangs thesealing head 18 of the inner wall.

The inner end of the outer wall is now bent inwardly to form the sealing head 19 which interlocks wit-h the sealing bead 18 of the inner wall. "hereafter the beads 18 and19 are united by solder and sweating to hermetically seal the sections of the hollow body and complete the work.

By ineans'of the stop heads the two sections can be readily assembled so that they occupy the proper relative position, the plurality of small beads on the inner wall strengthen the float so that the sameis not liable to be crushed, the nonbeaded part of the outer section forms asmooth exterior for the float which permits of readily cleaning the same, and the interlocking sealing heads securely unite the sections and permit of conveniently sealingthe joint between the sections.

I claim as my invention:

1. A hollow elongated body comprising two cup-shaped sections of sheet metal each of which has a cylindrical side wall, the walls of the two sections telescoping one within the other, the inner wall having a partial stop bead extending circumferentially around this wall at the inner end of the same and a plurality of complete beads extending circumferentially around this wall at different distances from the end thereof, and the outer wall having an inwardly projecting circumferential stop bead engagin with the partial head of the inner wall and a blank part extending over other beads of the inner wall.

2. A hollow elongated body comprising 7 two cup-shaped sections of sheet metal each of whlch has a cylindrical side Wall, the

-walls of the two sections telescoping one within the other, the wall of the inner section having a partial stop head extending circuinferentially around this wall at the inner end thereof, a complete sealin head extending circumferentially aroun this wallat a distance from the partial stop bead and "a plurality of strengthening beads between said stop bead and said sealing bead, 

